Chang Taigu advantage of foundry share with you ductile covers: Advantages ductile covers are high strength ductile iron manhole covers bearing, especially a large number of applications now covers bearing ductile good, fast in the main highways and urban roads and Ring Road and many other applications some covers, but now a new luster technology developed five anti-covers, and can play a anti-theft ductile iron covers hop quotes, anti-abnormal sound, anti-sinking sell manhole covers, anti-displacement characteristics, wide trusted by customers throughout the country. Taigu Chang foundry specializing in ductile iron covers, welcome! The new anti-theft ductile iron covers the surface due to the combination box cover cushion pad polychlorinated ethers heightening the box and lid with depth using six block with close contact with the cover and with the use of hinges. Screw fastening bolt and anti-theft locks substantially eliminates the noise and vibration reduction basically eliminate the noise problem occurs the old ring gray cast iron covers widespread impact by a car when the car was taken away and impact of the phenomenon. Manhole covers bearing | Chang in foundry (certified) | Changchun manhole covers are provided by Taigu Chang in foundry. Taigu Chang in foundry (www.sxcnzz.com) is Jinzhong, machining leaders, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Chang in foundry leadership with the staff warmly welcome all inquiries negotiations to create Chang foundry in a better future.